From c6ae8d586b683c741833db006e829010b622df9f Mon Sep 17 00:00:00 2001 From: Behdad Esfahbod Date: Fri, 15 Mar 2024 21:17:29 -0600 Subject: [PATCH] Add hb-geometry.hh --- src/Makefile.sources | 1 + src/hb-geometry.hh | 194 ++++++++++++++++++++++++++++++++++++++++ src/hb-paint-extents.hh | 163 +-------------------------------- src/meson.build | 1 + 4 files changed, 197 insertions(+), 162 deletions(-) create mode 100644 src/hb-geometry.hh diff --git a/src/Makefile.sources b/src/Makefile.sources index eccb35678..71e62b8b4 100644 --- a/src/Makefile.sources +++ b/src/Makefile.sources @@ -40,6 +40,7 @@ HB_BASE_sources = \ hb-dispatch.hh \ hb-draw.cc \ hb-draw.hh \ + hb-geometry.hh \ hb-face.cc \ hb-face.hh \ hb-face-builder.cc \ diff --git a/src/hb-geometry.hh b/src/hb-geometry.hh new file mode 100644 index 000000000..b42de2228 --- /dev/null +++ b/src/hb-geometry.hh @@ -0,0 +1,194 @@ +/* + * Copyright © 2022 Behdad Esfahbod + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + */ +#ifndef HB_GEOMETRY_HH +#define HB_GEOMETRY_HH + +#include "hb.hh" + + +typedef struct hb_extents_t +{ + hb_extents_t () {} + hb_extents_t (float xmin, float ymin, float xmax, float ymax) : + xmin (xmin), ymin (ymin), xmax (xmax), ymax (ymax) {} + + bool is_empty () const { return xmin >= xmax || ymin >= ymax; } + bool is_void () const { return xmin > xmax; } + + void union_ (const hb_extents_t &o) + { + xmin = hb_min (xmin, o.xmin); + ymin = hb_min (ymin, o.ymin); + xmax = hb_max (xmax, o.xmax); + ymax = hb_max (ymax, o.ymax); + } + + void intersect (const hb_extents_t &o) + { + xmin = hb_max (xmin, o.xmin); + ymin = hb_max (ymin, o.ymin); + xmax = hb_min (xmax, o.xmax); + ymax = hb_min (ymax, o.ymax); + } + + void + add_point (float x, float y) + { + if (unlikely (is_void ())) + { + xmin = xmax = x; + ymin = ymax = y; + } + else + { + xmin = hb_min (xmin, x); + ymin = hb_min (ymin, y); + xmax = hb_max (xmax, x); + ymax = hb_max (ymax, y); + } + } + + float xmin = 0.f; + float ymin = 0.f; + float xmax = -1.f; + float ymax = -1.f; +} hb_extents_t; + +typedef struct hb_transform_t +{ + hb_transform_t () {} + hb_transform_t (float xx, float yx, + float xy, float yy, + float x0, float y0) : + xx (xx), yx (yx), xy (xy), yy (yy), x0 (x0), y0 (y0) {} + + void multiply (const hb_transform_t &o) + { + /* Copied from cairo, with "o" being "a" there and "this" being "b" there. */ + hb_transform_t r; + + r.xx = o.xx * xx + o.yx * xy; + r.yx = o.xx * yx + o.yx * yy; + + r.xy = o.xy * xx + o.yy * xy; + r.yy = o.xy * yx + o.yy * yy; + + r.x0 = o.x0 * xx + o.y0 * xy + x0; + r.y0 = o.x0 * yx + o.y0 * yy + y0; + + *this = r; + } + + void transform_distance (float &dx, float &dy) const + { + float new_x = xx * dx + xy * dy; + float new_y = yx * dx + yy * dy; + dx = new_x; + dy = new_y; + } + + void transform_point (float &x, float &y) const + { + transform_distance (x, y); + x += x0; + y += y0; + } + + void transform_extents (hb_extents_t &extents) const + { + float quad_x[4], quad_y[4]; + + quad_x[0] = extents.xmin; + quad_y[0] = extents.ymin; + quad_x[1] = extents.xmin; + quad_y[1] = extents.ymax; + quad_x[2] = extents.xmax; + quad_y[2] = extents.ymin; + quad_x[3] = extents.xmax; + quad_y[3] = extents.ymax; + + extents = hb_extents_t {}; + for (unsigned i = 0; i < 4; i++) + { + transform_point (quad_x[i], quad_y[i]); + extents.add_point (quad_x[i], quad_y[i]); + } + } + + float xx = 1.f; + float yx = 0.f; + float xy = 0.f; + float yy = 1.f; + float x0 = 0.f; + float y0 = 0.f; +} hb_transform_t; + +typedef struct hb_bounds_t +{ + enum status_t { + UNBOUNDED, + BOUNDED, + EMPTY, + }; + + hb_bounds_t (status_t status) : status (status) {} + hb_bounds_t (const hb_extents_t &extents) : + status (extents.is_empty () ? EMPTY : BOUNDED), extents (extents) {} + + void union_ (const hb_bounds_t &o) + { + if (o.status == UNBOUNDED) + status = UNBOUNDED; + else if (o.status == BOUNDED) + { + if (status == EMPTY) + *this = o; + else if (status == BOUNDED) + extents.union_ (o.extents); + } + } + + void intersect (const hb_bounds_t &o) + { + if (o.status == EMPTY) + status = EMPTY; + else if (o.status == BOUNDED) + { + if (status == UNBOUNDED) + *this = o; + else if (status == BOUNDED) + { + extents.intersect (o.extents); + if (extents.is_empty ()) + status = EMPTY; + } + } + } + + status_t status; + hb_extents_t extents; +} hb_bounds_t; + + +#endif /* HB_GEOMETRY_HH */ diff --git a/src/hb-paint-extents.hh b/src/hb-paint-extents.hh index f172bd42f..3a37f7dae 100644 --- a/src/hb-paint-extents.hh +++ b/src/hb-paint-extents.hh @@ -28,169 +28,8 @@ #include "hb.hh" #include "hb-paint.h" +#include "hb-geometry.hh" -typedef struct hb_extents_t -{ - hb_extents_t () {} - hb_extents_t (float xmin, float ymin, float xmax, float ymax) : - xmin (xmin), ymin (ymin), xmax (xmax), ymax (ymax) {} - - bool is_empty () const { return xmin >= xmax || ymin >= ymax; } - bool is_void () const { return xmin > xmax; } - - void union_ (const hb_extents_t &o) - { - xmin = hb_min (xmin, o.xmin); - ymin = hb_min (ymin, o.ymin); - xmax = hb_max (xmax, o.xmax); - ymax = hb_max (ymax, o.ymax); - } - - void intersect (const hb_extents_t &o) - { - xmin = hb_max (xmin, o.xmin); - ymin = hb_max (ymin, o.ymin); - xmax = hb_min (xmax, o.xmax); - ymax = hb_min (ymax, o.ymax); - } - - void - add_point (float x, float y) - { - if (unlikely (is_void ())) - { - xmin = xmax = x; - ymin = ymax = y; - } - else - { - xmin = hb_min (xmin, x); - ymin = hb_min (ymin, y); - xmax = hb_max (xmax, x); - ymax = hb_max (ymax, y); - } - } - - float xmin = 0.f; - float ymin = 0.f; - float xmax = -1.f; - float ymax = -1.f; -} hb_extents_t; - -typedef struct hb_transform_t -{ - hb_transform_t () {} - hb_transform_t (float xx, float yx, - float xy, float yy, - float x0, float y0) : - xx (xx), yx (yx), xy (xy), yy (yy), x0 (x0), y0 (y0) {} - - void multiply (const hb_transform_t &o) - { - /* Copied from cairo, with "o" being "a" there and "this" being "b" there. */ - hb_transform_t r; - - r.xx = o.xx * xx + o.yx * xy; - r.yx = o.xx * yx + o.yx * yy; - - r.xy = o.xy * xx + o.yy * xy; - r.yy = o.xy * yx + o.yy * yy; - - r.x0 = o.x0 * xx + o.y0 * xy + x0; - r.y0 = o.x0 * yx + o.y0 * yy + y0; - - *this = r; - } - - void transform_distance (float &dx, float &dy) const - { - float new_x = xx * dx + xy * dy; - float new_y = yx * dx + yy * dy; - dx = new_x; - dy = new_y; - } - - void transform_point (float &x, float &y) const - { - transform_distance (x, y); - x += x0; - y += y0; - } - - void transform_extents (hb_extents_t &extents) const - { - float quad_x[4], quad_y[4]; - - quad_x[0] = extents.xmin; - quad_y[0] = extents.ymin; - quad_x[1] = extents.xmin; - quad_y[1] = extents.ymax; - quad_x[2] = extents.xmax; - quad_y[2] = extents.ymin; - quad_x[3] = extents.xmax; - quad_y[3] = extents.ymax; - - extents = hb_extents_t {}; - for (unsigned i = 0; i < 4; i++) - { - transform_point (quad_x[i], quad_y[i]); - extents.add_point (quad_x[i], quad_y[i]); - } - } - - float xx = 1.f; - float yx = 0.f; - float xy = 0.f; - float yy = 1.f; - float x0 = 0.f; - float y0 = 0.f; -} hb_transform_t; - -typedef struct hb_bounds_t -{ - enum status_t { - UNBOUNDED, - BOUNDED, - EMPTY, - }; - - hb_bounds_t (status_t status) : status (status) {} - hb_bounds_t (const hb_extents_t &extents) : - status (extents.is_empty () ? EMPTY : BOUNDED), extents (extents) {} - - void union_ (const hb_bounds_t &o) - { - if (o.status == UNBOUNDED) - status = UNBOUNDED; - else if (o.status == BOUNDED) - { - if (status == EMPTY) - *this = o; - else if (status == BOUNDED) - extents.union_ (o.extents); - } - } - - void intersect (const hb_bounds_t &o) - { - if (o.status == EMPTY) - status = EMPTY; - else if (o.status == BOUNDED) - { - if (status == UNBOUNDED) - *this = o; - else if (status == BOUNDED) - { - extents.intersect (o.extents); - if (extents.is_empty ()) - status = EMPTY; - } - } - } - - status_t status; - hb_extents_t extents; -} hb_bounds_t; typedef struct hb_paint_extents_context_t hb_paint_extents_context_t; diff --git a/src/meson.build b/src/meson.build index d398143d6..58413a951 100644 --- a/src/meson.build +++ b/src/meson.build @@ -46,6 +46,7 @@ hb_base_sources = files( 'hb-dispatch.hh', 'hb-draw.cc', 'hb-draw.hh', + 'hb-geometry.hh', 'hb-paint.cc', 'hb-paint.hh', 'hb-paint-extents.cc',